// This is the command sequence that rotates the RM68140 driver coordinate frame


writecommand(TFT_MADCTL);
rotation = m % 4;
switch (rotation) {
case 0: // Portrait
    writedata(TFT_MAD_BGR);
    writecommand(0xB6);
    writedata(0);
    writedata(0x22);
    writedata(0x3B);
    _width  = TFT_WIDTH;
    _height = TFT_HEIGHT;
    break;
case 1: // Landscape (Portrait + 90)
    writedata(TFT_MAD_MV | TFT_MAD_BGR);
    writecommand(0xB6);
    writedata(0);
    writedata(0x02);
    writedata(0x3B);
    _width  = TFT_HEIGHT;
    _height = TFT_WIDTH;
    break;
case 2: // Inverter portrait
    writedata(TFT_MAD_BGR);
    writecommand(0xB6);
    writedata(0);
    writedata(0x42);
    writedata(0x3B);
    _width  = TFT_WIDTH;
    _height = TFT_HEIGHT;
    break;
case 3: // Inverted landscape
    writedata(TFT_MAD_MV | TFT_MAD_BGR);
    writecommand(0xB6);
    writedata(0);
    writedata(0x62);
    writedata(0x3B);
    _width  = TFT_HEIGHT;
    _height = TFT_WIDTH;
    break;
}

